diff -Naurd mpfr-3.1.5-a/PATCHES mpfr-3.1.5-b/PATCHES
--- mpfr-3.1.5-a/PATCHES	2017-06-06 19:21:17.580843571 +0000
+++ mpfr-3.1.5-b/PATCHES	2017-06-06 19:21:17.604843293 +0000
@@ -0,0 +1 @@
+ret-macro
diff -Naurd mpfr-3.1.5-a/VERSION mpfr-3.1.5-b/VERSION
--- mpfr-3.1.5-a/VERSION	2016-12-19 22:11:17.094676820 +0000
+++ mpfr-3.1.5-b/VERSION	2017-06-06 19:21:17.604843293 +0000
@@ -1 +1 @@
-3.1.5-p2
+3.1.5-p3
diff -Naurd mpfr-3.1.5-a/src/mpfr-impl.h mpfr-3.1.5-b/src/mpfr-impl.h
--- mpfr-3.1.5-a/src/mpfr-impl.h	2016-09-27 07:58:15.000000000 +0000
+++ mpfr-3.1.5-b/src/mpfr-impl.h	2017-06-06 19:21:17.592843433 +0000
@@ -873,7 +873,7 @@
    following two macros, unless the flag comes from another function
    returning the ternary inexact value */
 #define MPFR_RET(I) return \
-  (I) ? ((__gmpfr_flags |= MPFR_FLAGS_INEXACT), (I)) : 0
+  (I) != 0 ? ((__gmpfr_flags |= MPFR_FLAGS_INEXACT), (I)) : 0
 #define MPFR_RET_NAN return (__gmpfr_flags |= MPFR_FLAGS_NAN), 0
 
 #define MPFR_SET_ERANGE() (__gmpfr_flags |= MPFR_FLAGS_ERANGE)
diff -Naurd mpfr-3.1.5-a/src/mpfr.h mpfr-3.1.5-b/src/mpfr.h
--- mpfr-3.1.5-a/src/mpfr.h	2016-12-19 22:11:17.090676815 +0000
+++ mpfr-3.1.5-b/src/mpfr.h	2017-06-06 19:21:17.600843340 +0000
@@ -27,7 +27,7 @@
 #define MPFR_VERSION_MAJOR 3
 #define MPFR_VERSION_MINOR 1
 #define MPFR_VERSION_PATCHLEVEL 5
-#define MPFR_VERSION_STRING "3.1.5-p2"
+#define MPFR_VERSION_STRING "3.1.5-p3"
 
 /* Macros dealing with MPFR VERSION */
 #define MPFR_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
diff -Naurd mpfr-3.1.5-a/src/version.c mpfr-3.1.5-b/src/version.c
--- mpfr-3.1.5-a/src/version.c	2016-12-19 22:11:17.094676820 +0000
+++ mpfr-3.1.5-b/src/version.c	2017-06-06 19:21:17.604843293 +0000
@@ -25,5 +25,5 @@
 const char *
 mpfr_get_version (void)
 {
-  return "3.1.5-p2";
+  return "3.1.5-p3";
 }